When working, the crop is fed continuously and evenly, and the crop is cut off by the plate teeth on the roller jane and the screen combination parts to make the seeds separate from the stem, and flow from the screen into the bottom bin, which is conveyed by the winch to the lifting hopper, and under the joint action of the gravitational force of the fan, it passes through the cyclone separator to separate the young grains from the debris, and the broken stem is conveyed out of the machine by the churn to complete the threshing.